CN201671924U - Telescopic rod tube internal expansion connecting device - Google Patents
Telescopic rod tube internal expansion connecting device Download PDFInfo
- Publication number
- CN201671924U CN201671924U CN2010201751166U CN201020175116U CN201671924U CN 201671924 U CN201671924 U CN 201671924U CN 2010201751166 U CN2010201751166 U CN 2010201751166U CN 201020175116 U CN201020175116 U CN 201020175116U CN 201671924 U CN201671924 U CN 201671924U
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- Prior art keywords
- expansion
- tube
- expansion tube
- connecting device
- rod
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- Expired - Fee Related
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Abstract
The utility model discloses a telescopic rod tube internal expansion connecting device, which comprises a conical screw rod 1, a guide nut 3 and an expansion tube 2. A radial hole 24 is arranged on the upper portion of the expansion tube, and the guide nut 3 is disposed inside the radial hole 24 on the upper portion of the expansion tube. The internal expansion connecting device is characterized in that the expansion tube 2 consists of two to three split type expansion plates 21 and is provided with an elastic fixing ring 4 disposed inside an peripheral groove 22 of the split type expansion plates 21. The internal expansion connecting device has the advantages that the expansion plates of the expansion tube are arranged in split form, when the lower portions of the expansion plates of the expansion tube are expanded, the upper portions of the expansion plates can be expanded along with the lower portions, further, since the elastic fixing ring is arranged on the expansion plates, the expansion plates cannot be separated, and the contact face of the inner wall of an outer rod tube and the expansion tube is greatly enlarged, while the friction resistance is also increased. According to estimates, compared with existing expansion tubes of the same specification, the bearing force of the internal expansion connecting device is increased by at least more than two times.
Description
Technical field:
The utility model relates to a kind of expansion connection set, specifically is a kind of expansion connection set that is used in the flexible rod tube.
Background technique:
Existing telescopic mast or pull bar, such as telescopic alpin-stock, crutch, being connected between its bar and the bar, generally all be to adopt the rod tube inner intumescence type to connect, the expansion connection set mainly is by the cone screw rod in the existing flexible rod tube, expansion tube is formed, the top of its expansion tube is a disjunctor, the centre is interior sky, about body is divided into two, when the internal chamber wall of outer bar be enclosed within expansion tube about on two outer walls during precession, drive the expansion tube precession, the expansion tube inner side surface make along the face precession of cone screw rod expansion tube about sheet strutted gradually, the expansion tube swelling between the inwall of the outer wall of the interior rod tube of flexible rod and outer rod tube, thereby in the outer rod tube of flexible rod is fixedly connected on the certain position of rod tube.Expansion connection set in the flexible rod tube of existing this structure, because the upper top of its expansion tube is a disjunctor, when expansion tube during along the precession of cone screw rod, the outer wall of its expansion tube also forms conical surface gradually, the inwall of outer rod tube and the surface of contact of expansion tube are the annulus of expansion tube bottom, and its surface friction drag is little, are difficult to bear bigger strength, be easier to make the downward slippage of outer rod tube, the strong degree that it is connected and fixed is poor.
The model utility content:
The technical problems to be solved in the utility model is, provides a kind of surface of contact big, and surface friction drag is big, and is fixedly connected firm, expansion connection set in the not eely flexible rod tube.
Technical solution of the present utility model is that a kind of interior expansion connection set of flexible rod tube with following structure is provided.
Expansion connection set in a kind of flexible rod tube, comprise cone screw rod, spigot nut, expansion tube, spigot nut is arranged in the top radial hole of expansion tube, it is characterized in that, described expansion tube is made up of two to three split type intumescent sheets, described intumescent sheet outer wall is provided with circumferential recess, also is provided with the flexible fastening circle, and described flexible fastening circle is arranged in the circumferential recess of split type intumescent sheet.
After adopting above structure, compared with prior art, the utlity model has following advantage: owing to be arranged to the intumescent sheet of expansion tube split type, when the outer rod tube precession drives expansion tube along the precession of cone screw rod face, when the intumescent sheet lower expansion of expansion tube is amplified, the amplification of expanding too of the top of its intumescent sheet, simultaneously owing to be equipped with the flexible fastening circle on the intumescent sheet, its intumescent sheet can loosely not held, and like this, the inwall of outer rod tube and the surface of contact of expansion tube increase greatly, its surface friction drag increases too, according to measuring and calculating, the expansion tube of same size, its strength increases more than two times at least than existing expansion tube.
As improvement, the surface of described intumescent sheet is provided with some circumferential bulge loop muscle or twisted steel.This structure has increased the surface friction drag of outer rod tube and expansion tube, makes its interior outer rod tube fixedly connected more firm, also big its strength that increased.
As another improvement, the height of described expansion tube top radial hole is two times of spigot nut thickness.This set, the master is when preventing that outer rod tube is subjected to strength excessive, outer rod tube is suddenly when lower slider, the ultimate range that drives the expansion tube downslide is the thickness of spigot nut, that is to say, stressed when excessive when outer rod tube, drive the glide thickness of a spigot nut of expansion tube, the top of expansion tube just withstands on the spigot nut, can be again to lower slider.
Description of drawings:
Fig. 1 is expansion connection set structural representation in the flexible rod tube of the utility model;
Fig. 2 is the structure explosive view of expansion connection set in the flexible rod tube of the utility model.
Shown in the figure: 1, cone screw rod, 11, screw rod, 12, cone body rod, 2, expansion tube, 21, intumescent sheet, 22, circumferential recess, 23, circumferential bulge loop muscle, 24, radial hole, 3, spigot nut, 4, the flexible fastening circle, 5, the cone screw bolt seat.
Embodiment:
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Fig. 1, shown in Figure 2, expansion connection set in a kind of flexible rod tube, comprise cone screw rod 1, spigot nut 3, expansion tube 2, the top of expansion tube is provided with radial hole 24, spigot nut 3 is arranged in the top radial hole 24 of expansion tube, described expansion tube 2 is made up of the split type intumescent sheet 21 of 2-3 sheet, present embodiment is set to two, be arranged on circumferential recess 22 on described intumescent sheet 21 outer walls, also be provided with flexible fastening circle 4, described flexible fastening circle 4 is arranged in the circumferential recess 22 of split type intumescent sheet 21.The surface, middle and lower part of described intumescent sheet 21 is provided with some circumferential bulge loop muscle 23 or twisted steel, and shown in the drawings in the present embodiment is circumferential bulge loop muscle 23.The height of expansion tube 2 top radial holes 24 is two times of spigot nut thickness
Described cone screw rod 1 is made up of screw rod 11 and cone body rod 12, and cone body rod 12 is fixed on the middle and lower part of screw rod 11, and the cone screw rod is fixed on the cone screw bolt seat 5.
During installation, cone screw bolt seat 5 is fixedly mounted on the interior rod tube upper end of flexible rod, cone screw rod 1 is fixed on the cone screw bolt seat 5, be enclosed within the circumferential recess 22 on the intumescent sheet 21 with flexible fastening circle 4, split type intumescent sheet 21 is assembled into the expansion tube 2 of an integral body, in the radial hole 24 on the spigot nut 3 threading expansion tubes 2, then expansion tube 2 and spigot nut 3 are enclosed within on the cone screw rod 1, spigot nut 3 is spun on the screw thread of cone screw rod 1, with another nut expansion tube 2 and spigot nut 3 is located on the cone screw rods 1 again.
During use, height or length that the root a tree name needs, the appropriate location of outer rod tube is enclosed within on the expansion tube 2, behind the location,, drive expansion tube 2 precessions with the outer rod tube precession, the amplification of will expanding gradually along the surface of cone screw rod 1 of the split type intumescent sheet 21 of expansion tube 2, until with outer rod tube again till the precession, whole flexible rod just connects and has fixed, and can use.Because when intumescent sheet 21 lower expansion of expansion tube 2 are amplified, under the pressure of outer rod tube, the amplification of expanding too of the top of its intumescent sheet 21 is owing to be equipped with flexible fastening circle 4 on the intumescent sheet 21, its intumescent sheet 21 can loosely not held, like this, the inwall of outer rod tube all contacts basically with the surface of the intumescent sheet of expansion tube 21, thereby its surface of contact increases greatly, its surface friction drag increases too, according to measuring and calculating, the expansion tube of same size, its strength increases more than two times at least than existing expansion tube.
Claims (4)
1. expansion connection set in the flexible rod tube, comprise cone screw rod (1), spigot nut (3), expansion tube (2), the top of described expansion tube (2) is provided with radial hole (24), described spigot nut (3) is arranged in the top radial hole (24) of described expansion tube (2), it is characterized in that: described expansion tube (2) is made up of two to three split type intumescent sheets (21), also be provided with flexible fastening circle (4), described flexible fastening circle (4) is arranged in the circumferential recess (22) of split type intumescent sheet (21).
2. expansion connection set in the flexible rod tube as claimed in claim 1, it is characterized in that: the surface, middle and lower part of described intumescent sheet (21) is provided with some circumferential bulge loop muscle (23).
3. expansion connection set in the flexible rod tube as claimed in claim 1, it is characterized in that: the surface, middle and lower part of described intumescent sheet (21) is provided with some twisted steels.
4. expansion connection set in the flexible rod tube as claimed in claim 1, it is characterized in that: the height of described expansion tube (2) top radial hole (24) is two times of spigot nut (3) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201751166U CN201671924U (en) | 2010-04-26 | 2010-04-26 | Telescopic rod tube internal expansion connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201751166U CN201671924U (en) | 2010-04-26 | 2010-04-26 | Telescopic rod tube internal expansion connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201671924U true CN201671924U (en) | 2010-12-15 |
Family
ID=43329336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201751166U Expired - Fee Related CN201671924U (en) | 2010-04-26 | 2010-04-26 | Telescopic rod tube internal expansion connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201671924U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416637A (en) * | 2011-11-25 | 2012-04-18 | 王国强 | Up and down multi-chip dislocation saw for cutting plates |
| CN102840562A (en) * | 2011-06-24 | 2012-12-26 | 海洋王照明科技股份有限公司 | Lamp post |
| CN109869394A (en) * | 2019-04-10 | 2019-06-11 | 罗定市麟千五金科技有限公司 | Setscrew |
-
2010
- 2010-04-26 CN CN2010201751166U patent/CN201671924U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840562A (en) * | 2011-06-24 | 2012-12-26 | 海洋王照明科技股份有限公司 | Lamp post |
| CN102840562B (en) * | 2011-06-24 | 2015-06-10 | 海洋王照明科技股份有限公司 | Lamp post |
| CN102416637A (en) * | 2011-11-25 | 2012-04-18 | 王国强 | Up and down multi-chip dislocation saw for cutting plates |
| CN109869394A (en) * | 2019-04-10 | 2019-06-11 | 罗定市麟千五金科技有限公司 | Setscrew |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20160426 |